..SNAKEBIT..
VIP Member
installing used set of pipes and was wondering what guys were running?
wanted to keep the tempa-flow hooked up.
jets =
pilots =
air screw =
needles =
etc.???
PS. what type of heat tape is needed? does anyone have pictures of the tape
applied??
wanted to keep the tempa-flow hooked up.
jets =
pilots =
air screw =
needles =
etc.???
PS. what type of heat tape is needed? does anyone have pictures of the tape
applied??
Yamadogger
New member
Jetting
For CPR pipes w/ Jeff's head mod and Tempaflow I run the following jetting (PTO, CTR, MAG):
Mains - 165, 165, 167.5
Needles - 3.5, 4, 4
Pilots - 45, 45, 47.5
Fuel Screws - all 2 1/4 turns out
This jetting is pretty aggressive and will get you about 10-11 mpg riding hard. Remote fuel screw adjusters would allow you to really dial it in but I've ridden this exact same jetting from -30F to +50F and had pretty consistent EGTs throughout. I should mention that this jetting is for a Tempaflow mounted under the airbox shelf and vented inside the airbox.
For CPR pipes w/ Jeff's head mod and Tempaflow I run the following jetting (PTO, CTR, MAG):
Mains - 165, 165, 167.5
Needles - 3.5, 4, 4
Pilots - 45, 45, 47.5
Fuel Screws - all 2 1/4 turns out
This jetting is pretty aggressive and will get you about 10-11 mpg riding hard. Remote fuel screw adjusters would allow you to really dial it in but I've ridden this exact same jetting from -30F to +50F and had pretty consistent EGTs throughout. I should mention that this jetting is for a Tempaflow mounted under the airbox shelf and vented inside the airbox.
full tilt viper
New member
hey yamadogger! Just picked up this thread , sounder interesting. I am running a simular set up to yours ( bender ceramic pipes egt's).Just installed a dash mounted vari flow.I run a speedwerx head even comp. Jeff recomender 160,160,162.5 .50 pilots , 4 across needles . 2 shims under 1-2
2 shims on top # 3. I see you run alot smaller pilot. My sled loads up bad at in warmer temps at partial throttle. I thought the vari flow and temp flow lean the entire circuit right down to the pilots. I want to make sure when ilean it out that it does'nt go to far on my pilots.Also I know you run H Hitters.They supplied the springs .What set up hole #1 etc do you find works best and are you pulling consistant rpms. Bender recomends 8700-8800. I'm
0 elev,Roller rooster 41\37 or 47\43. 1 1\4 track ,8 tooth drivers 144 studs
1.95 gear ratio. Because it's geared down can i load the motor in the primary
or pull a more aggresive helix 47\43?
thanks Steve
2 shims on top # 3. I see you run alot smaller pilot. My sled loads up bad at in warmer temps at partial throttle. I thought the vari flow and temp flow lean the entire circuit right down to the pilots. I want to make sure when ilean it out that it does'nt go to far on my pilots.Also I know you run H Hitters.They supplied the springs .What set up hole #1 etc do you find works best and are you pulling consistant rpms. Bender recomends 8700-8800. I'm
0 elev,Roller rooster 41\37 or 47\43. 1 1\4 track ,8 tooth drivers 144 studs
1.95 gear ratio. Because it's geared down can i load the motor in the primary
or pull a more aggresive helix 47\43?
thanks Steve
Yamadogger
New member
Pilots
Tempaflows/Variflows do not affect the pilot circuit to the extent they do the mains. If you talk to Barry Holtzman he will tell you that the effect on the pilot circuit is minimal due to the low amount of vacuum generated at low rpms (throttle position). Don't get me wrong, it still makes a difference but is not linear.
As far as smaller pilots, with equalized compression heads and rear exchanger you should be able to go down on your pilots but with the Variflow you will need to raise your mains up a bit. Your loading up problem is definitely a result of your large pilots. I ran about the same jetting as you before the Tempaflow but that will be too lean once you throw a jetting compensator on it. I think you may have your needles backward as well (assuming you're calling #1 your PTO cylinder). You should have your MAG side needle higher (richer) than the others and from your description it sounds like that is your leanest one. 2 shims on top with e-clip in #4 would be the same as having your e-clip in #3 with both washers on the bottom (which is considered position #3)
My Heavy Hitters are 48 gram base weights with a bare metal spring (not sure the specs but it's the one Jeff supplies with his Heavy Hitter kit). I have the weights set up with a 1/2" allen in the base, 7/16" steel bolt w/ thick steel washer in the middle and the tip empty. Secondary is stock straight 47 degree helix w/ silver spring wrapped at 6-2. This setup pulls very hard all the way through and runs right at 9100 rpm. You'd need to revise slightly to get the 8800 rpm you're looking for.
Tempaflows/Variflows do not affect the pilot circuit to the extent they do the mains. If you talk to Barry Holtzman he will tell you that the effect on the pilot circuit is minimal due to the low amount of vacuum generated at low rpms (throttle position). Don't get me wrong, it still makes a difference but is not linear.
As far as smaller pilots, with equalized compression heads and rear exchanger you should be able to go down on your pilots but with the Variflow you will need to raise your mains up a bit. Your loading up problem is definitely a result of your large pilots. I ran about the same jetting as you before the Tempaflow but that will be too lean once you throw a jetting compensator on it. I think you may have your needles backward as well (assuming you're calling #1 your PTO cylinder). You should have your MAG side needle higher (richer) than the others and from your description it sounds like that is your leanest one. 2 shims on top with e-clip in #4 would be the same as having your e-clip in #3 with both washers on the bottom (which is considered position #3)
My Heavy Hitters are 48 gram base weights with a bare metal spring (not sure the specs but it's the one Jeff supplies with his Heavy Hitter kit). I have the weights set up with a 1/2" allen in the base, 7/16" steel bolt w/ thick steel washer in the middle and the tip empty. Secondary is stock straight 47 degree helix w/ silver spring wrapped at 6-2. This setup pulls very hard all the way through and runs right at 9100 rpm. You'd need to revise slightly to get the 8800 rpm you're looking for.
Yamadogger, any snow up there? Are the lakes frozen over yet?
full tilt viper
New member
yamadogger
Thanks for getting back! Without any weight in the tip what is your top end like? I did'nt run any tip weight in the hammer times and lost top end. Tell me what kind of mods and set up you run. The picture is impressive! It looks like it hauls.
Thanks for getting back! Without any weight in the tip what is your top end like? I did'nt run any tip weight in the hammer times and lost top end. Tell me what kind of mods and set up you run. The picture is impressive! It looks like it hauls.
Yamadogger
New member
The lakes are mostly frozen, some small parts of Rainy aren't quite frozen but Kab is completely frozen and people have spear fishing houses out in the bays already. We have a couple inches and hopefully more on the way. Right now you could ride some ditches if you wanted but you'd have to be really desperate.
As far as my top end, it really hauls the mail. On the dream-o-meter I've seen low 130's so actual is probably 115 or so. It easily top ends all of the SRXs I ride with. Other mods are pretty minor - V-Force Reeds, 9830 Camo track w/ 144 down the center, SRX rear exchanger, otherwise just some cosmetic stuff.
As far as my top end, it really hauls the mail. On the dream-o-meter I've seen low 130's so actual is probably 115 or so. It easily top ends all of the SRXs I ride with. Other mods are pretty minor - V-Force Reeds, 9830 Camo track w/ 144 down the center, SRX rear exchanger, otherwise just some cosmetic stuff.
With SLP's & CPR Head Mod.
160 mains all the way across
3.5 needle all the way across
2 1/4 fuel screw all the way across
47.5 pilots all the way across
Have Opticool, rear heat exchanger and temp-a-flow. Ran this in -20F to +30F at 1,300ft. 10-12 mpg.
160 mains all the way across
3.5 needle all the way across
2 1/4 fuel screw all the way across
47.5 pilots all the way across
Have Opticool, rear heat exchanger and temp-a-flow. Ran this in -20F to +30F at 1,300ft. 10-12 mpg.
..SNAKEBIT..
VIP Member
thanks Yamadogger is any one else running this?
stock Viper w/CPR and tempa-flow (where are you mounting it? )
stock Viper w/CPR and tempa-flow (where are you mounting it? )
Yamadogger
New member
Tempaflow
Mount the Tempaflow under the airbox shelf. The temperature inside the airbox changes VERY slowly and therefore this installation is safer than mounting it above the shelf. Make sure to vent the Tempaflow inside the airbox. I installed the Tempaflow between the PTO & CTR downtubes as high as possible, just so it didn't hit the underside of the shelf. This location allows you to utilize the existing carb vent hole in the front of the airbox, simply remove the rubber nipple and slide the Tempaflow tubing through the hole and connect to the stock tee.
Mount the Tempaflow under the airbox shelf. The temperature inside the airbox changes VERY slowly and therefore this installation is safer than mounting it above the shelf. Make sure to vent the Tempaflow inside the airbox. I installed the Tempaflow between the PTO & CTR downtubes as high as possible, just so it didn't hit the underside of the shelf. This location allows you to utilize the existing carb vent hole in the front of the airbox, simply remove the rubber nipple and slide the Tempaflow tubing through the hole and connect to the stock tee.
Viper Sniper
New member
I used your setup and was running very rich getting 7mpg. I think I've got a bad tempaflow unit unfortunately I can't recall who I bought it from (someone on these boards) I bought it new from whoever it was and would just like to find out if I can get it replaced under warranty. It was running so rich I got beat by a Fusion and those sleds are slugs.